34,122 → 34,16 |
*/ |
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#include <mm/frame.h> |
#include <arch/mm/frame.h> |
#include <mm/as.h> |
#include <config.h> |
#include <arch/boot/boot.h> |
#include <arch/hypercall.h> |
#include <panic.h> |
#include <debug.h> |
#include <align.h> |
#include <macros.h> |
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#include <console/cmd.h> |
#include <console/kconsole.h> |
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uintptr_t last_frame = 0; |
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#define L0_PT_SHIFT 10 |
#define L3_PT_SHIFT 0 |
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#define L0_PT_ENTRIES 1024 |
#define L3_PT_ENTRIES 1024 |
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#define L0_INDEX_MASK (L0_PT_ENTRIES - 1) |
#define L3_INDEX_MASK (L3_PT_ENTRIES - 1) |
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#define PFN2PTL0_INDEX(pfn) ((pfn >> L0_PT_SHIFT) & L0_INDEX_MASK) |
#define PFN2PTL3_INDEX(pfn) ((pfn >> L3_PT_SHIFT) & L3_INDEX_MASK) |
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#define PAGE_MASK (~(PAGE_SIZE - 1)) |
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#define _PAGE_PRESENT 0x001UL |
#define _PAGE_RW 0x002UL |
#define _PAGE_USER 0x004UL |
#define _PAGE_PWT 0x008UL |
#define _PAGE_PCD 0x010UL |
#define _PAGE_ACCESSED 0x020UL |
#define _PAGE_DIRTY 0x040UL |
#define _PAGE_PAT 0x080UL |
#define _PAGE_PSE 0x080UL |
#define _PAGE_GLOBAL 0x100UL |
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#define L0_PROT (_PAGE_PRESENT | _PAGE_ACCESSED) |
#define L3_PROT (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED) |
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void frame_arch_init(void) |
{ |
if (config.cpu_active == 1) { |
/* The only memory zone starts just after page table */ |
pfn_t start = ADDR2PFN(ALIGN_UP(KA2PA(start_info.ptl0), PAGE_SIZE)) + start_info.pt_frames; |
size_t size = start_info.frames - start; |
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/* Create identity mapping */ |
pfn_t phys; |
count_t count = 0; |
for (phys = start; phys < start + size; phys++) { |
mmu_update_t updates[L3_PT_ENTRIES]; |
pfn_t virt = ADDR2PFN(PA2KA(PFN2ADDR(phys))); |
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size_t ptl0_index = PFN2PTL0_INDEX(virt); |
size_t ptl3_index = PFN2PTL3_INDEX(virt); |
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pte_t *ptl3 = (pte_t *) PFN2ADDR(start_info.ptl0[ptl0_index].frame_address); |
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if (ptl3 == 0) { |
mmuext_op_t mmu_ext; |
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pfn_t virt2 = ADDR2PFN(PA2KA(PFN2ADDR(start))); |
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/* New L1 page table entry needed */ |
memsetb(PFN2ADDR(virt2), PAGE_SIZE, 0); |
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size_t ptl0_index2 = PFN2PTL0_INDEX(virt2); |
size_t ptl3_index2 = PFN2PTL3_INDEX(virt2); |
pte_t *ptl3_2 = (pte_t *) PFN2ADDR(start_info.ptl0[ptl0_index2].frame_address); |
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if (ptl3_2 == 0) |
panic("Unable to find page table reference"); |
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updates[count].ptr = (uintptr_t) &ptl3_2[ptl3_index2]; |
updates[count].val = PA2MA(PFN2ADDR(start)) | L0_PROT; |
if (xen_mmu_update(updates, count + 1, NULL, DOMID_SELF) < 0) |
panic("Unable to map new page table"); |
count = 0; |
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mmu_ext.cmd = MMUEXT_PIN_L1_TABLE; |
mmu_ext.arg1.mfn = ADDR2PFN(PA2MA(PFN2ADDR(start))); |
if (xen_mmuext_op(&mmu_ext, 1, NULL, DOMID_SELF) < 0) |
panic("Error pinning new page table"); |
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pte_t *ptl0 = (pte_t *) PA2MA(KA2PA(start_info.ptl0)); |
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updates[count].ptr = (uintptr_t) &ptl0[ptl0_index]; |
updates[count].val = PA2MA(PFN2ADDR(start)) | L3_PROT; |
if (xen_mmu_update(updates, count + 1, NULL, DOMID_SELF) < 0) |
panic("Unable to update PTE for page table"); |
count = 0; |
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ptl3 = (pte_t *) PFN2ADDR(start_info.ptl0[ptl0_index].frame_address); |
start++; |
size--; |
/* The only memory zone */ |
zone_create(meminfo.start, meminfo.size, meminfo.start + meminfo.reserved, 0); |
frame_mark_unavailable(meminfo.start, meminfo.reserved); |
} |
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updates[count].ptr = (uintptr_t) &ptl3[ptl3_index]; |
updates[count].val = PA2MA(PFN2ADDR(phys)) | L3_PROT; |
count++; |
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if ((count == L3_PT_ENTRIES) || (phys + 1 == start + size)) { |
if (xen_mmu_update(updates, count, NULL, DOMID_SELF) < 0) |
panic("Unable to update PTE"); |
count = 0; |
} |
} |
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zone_create(start, size, start, 0); |
last_frame = start + size; |
} |
} |
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/** @} |
*/ |